Bolt-cutter



(No Model.)

0. A. SATHE.

BOLT OUTTER. No. 324,961. Patented Aug. 25, 1885.

NITED STATES PATENT OFFICE.

OLE SATHE, OF JACKSON, MINNESOTA.

BOLT-CUTTER.

$PECIFICATION forming part of Letters Patent No. 324,961, dated August 25, 1885.

(No model.)

To all whom it 72mg concern:

invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in hand bolt-cutters; and it consists in the construction and arrangement of the several parts hereinafter fully deseribed,and pointed out in the claims.

In the drawings, Figure 1 is a plan of the bolt-cutter with jaws extended. Fig. 2 shows the jaws closed. Fig. 3 is an edge view, and Fig. 4 shows the back of the cutter.

a is a strong back or base, to which the operating parts of the device are secured. This base is provided with an extension, a, which serves as a handle; but this handle could be dispensed with if the device were to be fixed to a permanent support. By cutting the handie off at a point about opposite a", the base could be made fast by a suitable bolt or screw to a stationary support, and the jaws could then be operated by the lever and one hand, as hereinafter described. I prefer to construct the back or base with the handle, for then it can be carried about as other tools, and be operated by both hands. On the top side of the handle a, midway its ends, I fix a stop, a so arranged as to engage and stop the movement of the cam-lever just as the edges of the cutting-jaws come together.

The blades I) b are pivoted on pins If near the outer end of the base, and arranged so that they open or close, as shown by Figs. 1 and 2. Each blade is provided with an extension or shank, Z)", by which it is operated. The shanks are different in length, as shown, so as to permit the free action of the cam-lever. A cam wing or extension, I), and a similar extension, U, are formed on the inner ends of shanks. These extensions are curved on their outer edges, and are provided on their inner edges with cam-surfaces, against which the head of the cam-lever bears.

The cam-lever c is pivoted to the base-plate between the extensions Z) Its head 0 is made to bear against the inner edges of the cam wings or extensions and force the latter outward, and thereby close the jaws. By throwing the lever c outward, as shown in Fig. 1, the jaws are released, and may be opened by pressing the wings I) If toward each other. The jaws maybe openedby the hand; but it is preferable to provide an automatic device for opening them, said device being operated by the lever 0. Such a device, (I, is shown in the drawings, which consists of a bar pivoted midway its eudsto the pivot-pin of the lever c, and having at its ends short lips or flanges d, bent over the edges of the extensions b D The outer edges of these extensions are curved in such manner as to permit the flanges d to move along and close to them throughout their entire length. \Vhen the jaws are closed, as in Fig. 2, the flanges and the opening-lever d are in the position shown in Fig. 2. \Vhen the lever c is turned, as in Fig. 1, the opening-lever (1 turns with it, the flanges bear on the outer curved edges of the extensions, and the jaws are opened.

For the protection and strengthening of the device, I use a top plate, 0, which is fixed in place by the pivot-bolts of the jaws and the pivotbolt of the lever c, as shown. This top plate not only protects the jaws from dirt, but it serves to guide the lower ends or shanks of the jaws and prevent them from being strained by any side pressure exerted on their outer ends or blades.

This device is intended for hand use, and is made compact in form and very strong in its structure. It may be easily carried about as other tools.

Having described the invention, I claim 1. The combination of the base, the jaws pivoted to the outer-end of the base and provided with shanks extended back over the base and having camwings, and the lever provided with a cam-head pivoted to the base between the cam-wings of the blades, substantially as set forth.

2. The combination of the blades provided with extensions or shanks having curved camwings on the ends thereof, the lever having a cam-head pivoted between the cam-wings of the blades, and the openinglever d, pivoted midway its ends on the bolt of the cam-head, 5 and having flanges on its ends adapted to engage the said Wings and open the jaws, sub stantially as set forth.

3. The improved boltcutter hereinbefore described, consisting of the base-plate having 10 an extension or handle, the jaws pivoted to the outer end of the base-plate and provided with rear extensions having cam-rings there on, the cam or operating lever having a cam head pivoted to the base between the camwings of the jaws, the opening-lever d, and the top plate, 6, all arranged and operating substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

OLE A. SATHE.

Nitn esses:

S. SW'nNsoN, A. ANDRESON. 

